Glock 22/Lone Wolf barrel question

I think you can reload for a .40 Glock with the factory barrel, you just have to a bit careful on powder selection and not running near the upper end of pressures. I know many folks that have done so. I don't have a .40 Glock but have shot reloads, including cast reloads, through a Glock 21 .45 with no problems and minimal leading with good bullets. Just check early and often until you get a feel for how much leading you are getting.

The Lone Wolf barrel does give more case support from what I have seen and probably a little more peace of mind all the way around. One comment on pressure mentioned by the good Captain. I don't think pressure is the only factor, as the 9mm and .40 both have the same max SAAMI pressure of 35K psi. In fact the 9mm +p is even higher at 38.5K psi. My personal opinion is that the .40's have the most unsupported chambers of the Glocks because Glock somewhat rushed them to market and it was a design compromise to assist reliability. I believe the Glock .40's were the first .40's on the market, even beating S&W that helped develop the cartridge. When a larger diameter round is being fed out of a magazine, its centerline of the round will be lower than a smaller diameter round, all things being equal. In order to obtain the reliability Glocks are known for, they lowered the feedramp and compromised a bit more case support in the process than in their other guns. This was the penalty of releasing the .40 in the exact same frame. Of course the .45/10mm and other designs have got their own frame, and the .357 Sig has the advantage of being a bottleneck to assist feeding.